<html>
<body>
<form action="/test" method="POST">

    <label for="json">Type JSON string:</label><br>
    <textarea rows="10" cols="100" id="json" name="json">{"id": 1,"firstName": "Pavel","surName": "Jetenský","faculty":"FEI"}</textarea>
    <br>
    <input type="submit"/>

</form>
</body>
</html>